EP0810107A2 - Pneumatic radial tire - Google Patents
Pneumatic radial tire Download PDFInfo
- Publication number
- EP0810107A2 EP0810107A2 EP97303645A EP97303645A EP0810107A2 EP 0810107 A2 EP0810107 A2 EP 0810107A2 EP 97303645 A EP97303645 A EP 97303645A EP 97303645 A EP97303645 A EP 97303645A EP 0810107 A2 EP0810107 A2 EP 0810107A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bead
- carcass ply
- reinforcing layer
- tire
- radial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10819—Characterized by the structure of the bead portion of the tire
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10819—Characterized by the structure of the bead portion of the tire
- Y10T152/10837—Bead characterized by the radial extent of apex, flipper or chafer into tire sidewall
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10819—Characterized by the structure of the bead portion of the tire
- Y10T152/10846—Bead characterized by the chemical composition and or physical properties of elastomers or the like
Definitions
- the present invention relates to a radial tire for passenger vehicles, and in particular, to a bead structure which improves the stability and controllability of a radial tire including a pair of bead cores provided at bead portions, a carcass ply extending in a toroidal shape from one bead portion to the other bead portion and wound about the bead cores and anchored to the bead portions and formed from one radial cord layer, a belt and a tread disposed at a crown portion radial direction outer side of the carcass ply, bead fillers respectively starting from a radial direction outer side of a bead core and tapering toward the outer side, and bead reinforcing layers respectively disposed at a bead portion.
- a radial tire for passenger vehicles having a carcass ply formed from one radial cord layer is advantageous in that it has a simple structure and is lightweight.
- the rigidity of the bead portions is insufficient, which is disadvantageous with respect to stability and controllability. Therefore, attempts have been made to reinforce the bead portions by various methods such as increasing the volume of the bead fillers and using a rubber having a relatively high hardness (i.e., a rubber having a high JIS A hardness value).
- a rubber having a relatively high hardness i.e., a rubber having a high JIS A hardness value
- the structure is lightweight and has great effects, but is extremely disadvantageous from the point of view of cost.
- An object of the present invention is to provide a pneumatic radial tire in which stability and controllability are improved by reinforcing the bead portions without an accompanying increase in weight, deterioration in the comfort of the ride, or great increase in cost.
- the pneumatic radial tire of the present invention comprises: a pair of bead cores provided at bead portions; a carcass ply which extends in a toroidal shape from one bead portion to the other bead portion, and which is wound about the bead cores and anchored to the bead portions, and which is formed from one radial cord layer; a belt and a tread disposed at a crown portion radial direction outer side of the carcass ply; and bead fillers and bead reinforcing layers disposed at the bead portions; wherein the carcass ply is formed from a carcass ply main body which extends from one bead portion to the other bead portion, and carcass ply turn-over portions which are wound about the bead cores and extend to radial direction outer sides; each bead filler is interposed between the carcass ply main body and a carcass ply turn-over portion, and
- the angle of the cords of the bead reinforcing layer is 30 to 70 degrees with respect to the radial direction, the rigidity of the bead portion increases, and therefore, the improvement in stability and controllability is marked, which is preferable.
- the rigidity of the bead portion increases, which is preferable.
- the stability and controllability are improved if the bead fillers are formed from a rubber having a JIS A hardness of 70 degrees or more, the upper limit being 100 degrees which is an actual limit in manufacturing.
- the inner surface flexural rigidity can be made large. Further, in accordance with the tapering configuration of the bead filler, the difference in rigidity at this portion can be decreased, and therefore, the durability can be improved.
- the angle of the cords of the reinforcing layer is 30 to 70 degrees with respect to the radial direction, the inner surface flexural rigidity of the bead portion can be made even greater. In this way, the stability and controllability can be improved without using expensive aromatic polyamide fiber cords in the reinforcing layer. Further, there is no increase in weight as there is when steel cords having a high modulus of elasticity are used.
- the configuration, materials, properties, arrangement and the like of the bead filler 6 and the reinforcing layer 7 should be selected appropriately in accordance with the characteristics required of the tire.
- H1 should be set to 80% of SH
- F should be set to 70% of SH
- H2 should be disposed directly above the bead core (see Fig. 1).
- the position of the upper end of the carcass turn-over portion 82 may be selected appropriately.
- the upper end of the carcass turn-over portion 82 may preferably be disposed further toward the radial direction outer side than the upper end of the bead reinforcing layer 7 as illustrated in Fig. 3.
- Fig. 1 is a meridian cross-sectional view of a pneumatic radial tire according to the present invention.
- Fig. 2 is a meridian cross-sectional view of a pneumatic tire of a conventional example.
- Fig. 3 is a meridian cross-sectional view of a pneumatic tire according to another embodiment of the present invention.
- Tires according to embodiments of the present invention and pneumatic radial tires of a conventional example and comparative examples will be described hereinafter with reference to the drawings.
- the size of each of the tires is 205/65R15.
- Fig. 1 illustrates the structure of a bead portion of a tire of Examples 1 through 3 of the present invention and Comparative Examples 2 through 5.
- reference numeral 1 is a bead portion
- 2 is a bead core
- 3 is a tread
- 4 is a radial tire
- 5 are belts
- 6 is a bead filler
- 7 is a bead reinforcing layer
- 8 is a carcass ply
- 81 is a carcass ply main body
- 82 is a carcass turn-over portion
- E is the equatorial line.
- Fig. 2 illustrates the bead structure of Comparative Example 1.
- the difference between the structure of Fig. 1 and that of Fig. 2 is that in Fig. 2, the bead reinforcing layer is disposed at the tire axial direction outer side of the bead filler 6.
- Fig. 3 illustrates the structure of a bead portion of tires of Examples 4 through 6.
- the lower end of the bead reinforcing layer is shown as being positioned right above the upper end of the bead core.
- the lower end of the bead reinforcing layer may be positioned anywhere in a range from the upper end of the bead core to 5 mm beneath the upper end of the bead filler.
- the bead reinforcing layer of the tire of Comparative Example 2 uses aromatic polyamide fibers (aramid) of a cord modulus of elasticity of 2000 kg/mm 2 .
- the bead reinforcing layer of the tire of Example 3 uses polyethylene-2,6-naphthalate fibers (abbreviated "PEN") of a cord modulus of elasticity of 1400 kg/mm 2 .
- Polyester cords (abbreviated "PET”) of a cord modulus of elasticity of 800 kg/mm 2 are used as the bead reinforcing layers of the other tires.
- the upper end of the carcass turn-over portion 82 of the tires of Examples 4 through 6 is disposed further toward the radial direction outer side than the upper end of the bead reinforcing layer 7.
- tires according to Table 1 were inflated to an internal pressure of 2.0 kg/cm 2 , were mounted to 6 1/2J ⁇ 15 rims, were set on a drum tester under 490 kgf load, and the cornering power thereof was measured.
- the cornering power is the cornering force per one degree slip angle.
- the average values until a slip angle of 7 degrees are expressed as indices with 100 being the value of the conventional tire, and are listed in Table 1.
- higher values indicate better cornering power.
- the tires of Examples 1 through 5 have improved cornering power over the tire of the conventional example, and exhibit a substantially equivalent performance as the tire having a bead reinforcing layer using aromatic polyamide fibers.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
- The present invention relates to a radial tire for passenger vehicles, and in particular, to a bead structure which improves the stability and controllability of a radial tire including a pair of bead cores provided at bead portions, a carcass ply extending in a toroidal shape from one bead portion to the other bead portion and wound about the bead cores and anchored to the bead portions and formed from one radial cord layer, a belt and a tread disposed at a crown portion radial direction outer side of the carcass ply, bead fillers respectively starting from a radial direction outer side of a bead core and tapering toward the outer side, and bead reinforcing layers respectively disposed at a bead portion.
- A radial tire for passenger vehicles having a carcass ply formed from one radial cord layer is advantageous in that it has a simple structure and is lightweight. However, the rigidity of the bead portions is insufficient, which is disadvantageous with respect to stability and controllability. Therefore, attempts have been made to reinforce the bead portions by various methods such as increasing the volume of the bead fillers and using a rubber having a relatively high hardness (i.e., a rubber having a high JIS A hardness value). However, there are limits as to the extent to which improvements in the bead filler can improve stability and controllability.
- In addition, recently further improvements in stability and controllability have been required from the demand for better vehicle performance and for safer driving, and in order to meet the requirements, reinforcing the bead portions, apart from the bead fillers themselves, with organic fibers (e.g., aromatic polyamide fibers, commercial name "Kevlar" produced by Du pont, referred to herein as aramid), or inorganic fibers such as steel cords or the like have become standard for high performance tires in particular.
- Nevertheless, in the case in which the beads are reinforced with steel cord layers, although the rigidity is increased, the weight increases, the comfort of the ride deteriorates, and separation occurs at the steel cord ends which is a cause for trouble, whereas in the case in which the aramids having a high cord modulus of elasticity are used as a reinforcing material, the structure is lightweight and has great effects, but is extremely disadvantageous from the point of view of cost.
- An object of the present invention is to provide a pneumatic radial tire in which stability and controllability are improved by reinforcing the bead portions without an accompanying increase in weight, deterioration in the comfort of the ride, or great increase in cost.
- In order to achieve the above-described object, the pneumatic radial tire of the present invention comprises: a pair of bead cores provided at bead portions; a carcass ply which extends in a toroidal shape from one bead portion to the other bead portion, and which is wound about the bead cores and anchored to the bead portions, and which is formed from one radial cord layer; a belt and a tread disposed at a crown portion radial direction outer side of the carcass ply; and bead fillers and bead reinforcing layers disposed at the bead portions; wherein the carcass ply is formed from a carcass ply main body which extends from one bead portion to the other bead portion, and carcass ply turn-over portions which are wound about the bead cores and extend to radial direction outer sides; each bead filler is interposed between the carcass ply main body and a carcass ply turn-over portion, and is tapered from directly above a bead core toward a radial direction outer side; each bead reinforcing layer is interposed between the carcass ply main body and a bead filler, and along the carcass ply main body, the upper end of the bead reinforcing layer extends to a position at 30 to 80% of the tire cross-sectional height, and the upper end of the bead reinforcing layer is disposed further toward a radial direction outer side than that of the bead filler; and each bead reinforcing layer is formed from a rubber covered cord layer in which organic fiber cords having a modulus of elasticity of 700 to 1500 kg/mm2 are embedded in parallel in rubber.
- If the angle of the cords of the bead reinforcing layer is 30 to 70 degrees with respect to the radial direction, the rigidity of the bead portion increases, and therefore, the improvement in stability and controllability is marked, which is preferable.
- When the lower end of the bead reinforcing layer is positioned in the space from directly above the bead core to 5 mm beneath the upper end of the bead filler, the rigidity of the bead portion increases, which is preferable.
- Further, the stability and controllability are improved if the bead fillers are formed from a rubber having a JIS A hardness of 70 degrees or more, the upper limit being 100 degrees which is an actual limit in manufacturing.
- In accordance with the present invention, stability and controllability are improved by reinforcing the bead portions without an increase in weight, a deterioration in the comfort of the ride or a great increase in costs, by making the structure and arrangement of the bead fillers and the cord reinforcing layers appropriate as described above. The present invention is based on the following knowledge which was obtained from various experiments in order to achieve this object.
- (1) It is preferable for the upper end F of a
bead filler 6 to be positioned at 20 to 70% of a tire cross-sectional height SH. It is optimal for the JIS A hardness of the rubber forming thebead filler 6 to be 70 or more, the upper limit being 100 in actuality. Note that "tire cross-sectional height SH" is one-half of the difference between the tire outer diameter OD and the rim diameter RD. - (2) A
bead reinforcing layer 7 is interposed between a carcass plymain body 81 and thebead filler 6. It will be preferable for the upper end H1 of thebead reinforcing layer 7 to extend along the carcass plymain body 81 to a position at 30 to 80% of the tire cross-sectional height. In accordance with this arrangement, the carcass tension, at the time the tire is filled to standard internal pressure, of the portion along the carcass main body is high. Therefore, for example, an inner surface flexural rigidity can be obtained which is sufficiently greater than that obtained in a case in which the bead reinforcing layer is disposed at the tire axial direction outer side of a carcass turn-overportion 82 which has low carcass tension at the time the tire is filled to standard internal pressure. - By disposing the upper end of the bead reinforcing layer further toward the radial direction outer side than the bead filler upper end and by sufficiently overlapping the lower end of the bead reinforcing layer with the bead filler to 5 mm or more, the inner surface flexural rigidity can be made large. Further, in accordance with the tapering configuration of the bead filler, the difference in rigidity at this portion can be decreased, and therefore, the durability can be improved.
- If the angle of the cords of the reinforcing layer is 30 to 70 degrees with respect to the radial direction, the inner surface flexural rigidity of the bead portion can be made even greater. In this way, the stability and controllability can be improved without using expensive aromatic polyamide fiber cords in the reinforcing layer. Further, there is no increase in weight as there is when steel cords having a high modulus of elasticity are used.
- The configuration, materials, properties, arrangement and the like of the
bead filler 6 and the reinforcinglayer 7 should be selected appropriately in accordance with the characteristics required of the tire. For example, in a case in which the stability and controllability are to be greatly improved, H1 should be set to 80% of SH, F should be set to 70% of SH, and H2 should be disposed directly above the bead core (see Fig. 1). Further, the position of the upper end of the carcass turn-overportion 82 may be selected appropriately. However, if durability is to be improved, the upper end of the carcass turn-overportion 82 may preferably be disposed further toward the radial direction outer side than the upper end of thebead reinforcing layer 7 as illustrated in Fig. 3. - Fig. 1 is a meridian cross-sectional view of a pneumatic radial tire according to the present invention.
- Fig. 2 is a meridian cross-sectional view of a pneumatic tire of a conventional example.
- Fig. 3 is a meridian cross-sectional view of a pneumatic tire according to another embodiment of the present invention.
- Tires according to embodiments of the present invention and pneumatic radial tires of a conventional example and comparative examples will be described hereinafter with reference to the drawings. The size of each of the tires is 205/65R15.
- Fig. 1 illustrates the structure of a bead portion of a tire of Examples 1 through 3 of the present invention and Comparative Examples 2 through 5. In Fig. 1, reference numeral 1 is a bead portion, 2 is a bead core, 3 is a tread, 4 is a radial tire, 5 are belts, 6 is a bead filler, 7 is a bead reinforcing layer, 8 is a carcass ply, 81 is a carcass ply main body, 82 is a carcass turn-over portion, and E is the equatorial line.
- Fig. 2 illustrates the bead structure of Comparative Example 1. The difference between the structure of Fig. 1 and that of Fig. 2 is that in Fig. 2, the bead reinforcing layer is disposed at the tire axial direction outer side of the
bead filler 6. - Fig. 3 illustrates the structure of a bead portion of tires of Examples 4 through 6.
- In Figs. 1 and 3, the lower end of the bead reinforcing layer is shown as being positioned right above the upper end of the bead core. However, the lower end of the bead reinforcing layer may be positioned anywhere in a range from the upper end of the bead core to 5 mm beneath the upper end of the bead filler.
- The specifications of the Comparative Examples and the Examples are listed in Table 1, and the features thereof are described hereinafter.
- The bead reinforcing layer of the tire of Comparative Example 2 uses aromatic polyamide fibers (aramid) of a cord modulus of elasticity of 2000 kg/mm2. The bead reinforcing layer of the tire of Example 3 uses polyethylene-2,6-naphthalate fibers (abbreviated "PEN") of a cord modulus of elasticity of 1400 kg/mm2. Polyester cords (abbreviated "PET") of a cord modulus of elasticity of 800 kg/mm2 are used as the bead reinforcing layers of the other tires.
- The upper end of the carcass turn-over
portion 82 of the tires of Examples 4 through 6 is disposed further toward the radial direction outer side than the upper end of thebead reinforcing layer 7. - In order to confirm the effects of the present invention, tires according to Table 1 were inflated to an internal pressure of 2.0 kg/cm2, were mounted to 6 1/2J × 15 rims, were set on a drum tester under 490 kgf load, and the cornering power thereof was measured. The cornering power is the cornering force per one degree slip angle. The average values until a slip angle of 7 degrees are expressed as indices with 100 being the value of the conventional tire, and are listed in Table 1. Here, higher values indicate better cornering power.
TABLE 1 Bead Filler Bead Reinforcing Layer Arrangement Cornering Power Hardness F Angle Cord Type H1 Conventional Example 90 25% - - - - 100 Comp. Ex. 1 90 25% 45° PET 35% Fig. 2 103 Comp. Ex. 2 90 25% 45° aramid 35% Fig. 1 115 Comp. Ex. 3 65 25% 45° PET 35% Fig. 1 103 Comp. Ex. 4 90 15% 45° PET 35% Fig. 1 105 Comp. Ex. 5 90 15% 45° PET 25% Fig. 1 101 Ex. 1 90 25% 45° PET 35% Fig. 1 110 Ex. 2 90 40% 45° PET 50% Fig. 1 120 Ex. 3 90 25% 45° PEN 35% Fig. 1 113 Ex. 4 90 25% 45° PET 35% Fig. 3 112 Ex. 5 90 40% 45° PET 50% Fig. 3 122 Ex. 6 90 65% 45° PET 75% Fig. 3 130 - From the above results of evaluation, it can be seen that the tires of Examples 1 through 5 have improved cornering power over the tire of the conventional example, and exhibit a substantially equivalent performance as the tire having a bead reinforcing layer using aromatic polyamide fibers.
Claims (10)
- A radial tire, comprising:a pair of bead cores (2), one of the bead cores being provided at a left bead portion (1) and the other of the bead cores being provided at a right bead portion;a carcass ply (8) extending in a toroidal shape between the bead portions, and being formed from one radial cord layer which is wound about the pair of bead cores and anchored to the bead portions;a belt (5) and a tread (3) disposed at a crown portion radial direction outer side of the carcass ply; anda bead filler (6) and a bead reinforcing layer (7) disposed at each of the bead portions;wherein the carcass ply (8) is formed from a carcass ply main body (81) extending from one bead portion to the other bead portion, and carcass ply turn-over portions (82) each of which is wound about a bead core (2) and extends toward a radial direction outer side,the bead filler (6) is interposed between the carcass ply main body (81) and a carcass ply turn-over portion (82), and is tapered from directly above the bead core (2) toward a radial direction outer side,the bead reinforcing layer (7) is interposed between the carcass ply main body (81) and a bead filler (6), and along the carcass main body, an upper end (H1) of the bead reinforcing layer extending to a position at 30 to 80% of a tire cross-sectional height (SH), and the upper end of the bead reinforcing layer is disposed further toward a radial direction outer side than an upper end of the bead filler (6), andthe bead reinforcing layer (7) is formed from a rubber covered cord layer in which organic fiber cords having a modulus of elasticity of 700 to 1500 kg/mm2 are embedded in parallel in rubber.
- A radial tire as claimed in claim 1, characterized in that the predetermined position of the upper end (H1) of the bead reinforcing layer (7) is at 35 to 75% of the tire cross-sectional height (SH).
- A radial tire as claimed in claim 1 or 2, characterized in that the bead reinforcing layer (7) is formed from polyester cords having a cord modulus of elasticity of 800 kg/mm2.
- A radial tire as claimed in any of claims 1 to 3, characterized in that an angle of cords of the bead reinforcing layer (7) is 30 to 70 degrees with respect to a radial direction.
- A radial tire as claimed in claim 4, characterized in that the angle of the cords of the bead reinforcing layer (7) is 45 degrees with respect to the radial direction.
- A radial tire as claimed in any of claims 1 to 5, characterized in that a lower end of the bead reinforcing layer (7) is disposed in a range from directly above the bead core (2) to 5 mm beneath an upper end of the bead filler (6).
- A radial tire as claimed in any of claims 1 to 6, characterized in that a upper end (F) of the bead filler (6) is disposed so as to extend to a position at 20 to 70% of the tire cross-sectional height (SH).
- A radial tire as claimed in claim 7, characterized in that the upper end (F) of the bead filler (6) is disposed so as to extend to a position at 25 to 65% of the tire cross-sectional height.
- A radial tire as claimed in any of claims 1 to 8, characterized in that the bead filler (6) is formed of a rubber having a JIS A hardness of 70 to 100 degrees.
- A radial tire as claimed in any of claims 1 to 9, characterized in that an upper end of the carcass ply turn-over portion (82) is disposed further toward a radial direction outer side than an upper end (H1) of the bead reinforcing layer (7).
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP136920/96 | 1996-05-30 | ||
JP13692096 | 1996-05-30 | ||
JP13692096 | 1996-05-30 | ||
JP5452597 | 1997-03-10 | ||
JP54525/97 | 1997-03-10 | ||
JP05452597A JP3679218B2 (en) | 1996-05-30 | 1997-03-10 | Pneumatic radial tire |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0810107A2 true EP0810107A2 (en) | 1997-12-03 |
EP0810107A3 EP0810107A3 (en) | 1998-04-22 |
EP0810107B1 EP0810107B1 (en) | 2001-03-07 |
Family
ID=26395277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97303645A Expired - Lifetime EP0810107B1 (en) | 1996-05-30 | 1997-05-29 | Pneumatic radial tire |
Country Status (5)
Country | Link |
---|---|
US (1) | US5958163A (en) |
EP (1) | EP0810107B1 (en) |
JP (1) | JP3679218B2 (en) |
DE (1) | DE69704179T2 (en) |
ES (1) | ES2154880T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1925469B1 (en) * | 2006-11-22 | 2010-01-06 | The Goodyear Tire & Rubber Company | Pneumatic tire with asymmetric bead reinforcement |
US8413700B2 (en) | 2010-02-04 | 2013-04-09 | Bridgestone Americas Tire Operations, Llc | Tire having staggered turn-ups |
US8517072B2 (en) | 2010-02-04 | 2013-08-27 | Bridgestone Americas Tire Operations, Llc | Tire having gum strip and chafer |
CN111163948A (en) * | 2017-10-02 | 2020-05-15 | 米其林集团总公司 | Tire with reinforced lower region |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4923451B2 (en) * | 2005-07-04 | 2012-04-25 | 横浜ゴム株式会社 | Pneumatic tire |
JP4089787B1 (en) * | 2006-11-24 | 2008-05-28 | 横浜ゴム株式会社 | Pneumatic radial tire |
US20190184766A1 (en) * | 2017-12-15 | 2019-06-20 | The Goodyear Tire & Rubber Company | Pneumatic tire with a robust bead area structure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2066173A (en) * | 1979-12-25 | 1981-07-08 | Bridgestone Tire Co Ltd | Radial tyre for heavy vehicles |
GB2079686A (en) * | 1980-07-08 | 1982-01-27 | Bridgestone Tire Co Ltd | Pneumatic radial tire |
JPS6349502A (en) * | 1986-08-18 | 1988-03-02 | Sumitomo Rubber Ind Ltd | Tire for aeroplane |
JPH08175131A (en) * | 1994-12-26 | 1996-07-09 | Bridgestone Corp | Pneumatic tire |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5164029A (en) * | 1976-11-22 | 1992-11-17 | Sumitomo Rubber Industries, Ltd. | Radial tire for high load with excellent vibration damping performance |
JPS624615A (en) * | 1985-06-29 | 1987-01-10 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
JPH06443B2 (en) * | 1985-12-30 | 1994-01-05 | 横浜ゴム株式会社 | Radial tire |
JP2918229B2 (en) * | 1988-05-30 | 1999-07-12 | オーツタイヤ株式会社 | Radial tire |
JPH06143949A (en) * | 1992-11-10 | 1994-05-24 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for passenger car |
JPH06255322A (en) * | 1993-03-05 | 1994-09-13 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
JPH0966713A (en) * | 1995-09-01 | 1997-03-11 | Bridgestone Corp | Pneumatic radial tire |
-
1997
- 1997-03-10 JP JP05452597A patent/JP3679218B2/en not_active Expired - Fee Related
- 1997-05-27 US US08/862,991 patent/US5958163A/en not_active Expired - Lifetime
- 1997-05-29 DE DE69704179T patent/DE69704179T2/en not_active Expired - Lifetime
- 1997-05-29 ES ES97303645T patent/ES2154880T3/en not_active Expired - Lifetime
- 1997-05-29 EP EP97303645A patent/EP0810107B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2066173A (en) * | 1979-12-25 | 1981-07-08 | Bridgestone Tire Co Ltd | Radial tyre for heavy vehicles |
GB2079686A (en) * | 1980-07-08 | 1982-01-27 | Bridgestone Tire Co Ltd | Pneumatic radial tire |
JPS6349502A (en) * | 1986-08-18 | 1988-03-02 | Sumitomo Rubber Ind Ltd | Tire for aeroplane |
JPH08175131A (en) * | 1994-12-26 | 1996-07-09 | Bridgestone Corp | Pneumatic tire |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012, no. 267 (M-722), 26 July 1988 & JP 63 049502 A (SUMITOMO RUBBER IND LTD), 2 March 1988, * |
PATENT ABSTRACTS OF JAPAN vol. 096, no. 011, 29 November 1996 & JP 08 175131 A (BRIDGESTONE CORP), 9 July 1996, * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1925469B1 (en) * | 2006-11-22 | 2010-01-06 | The Goodyear Tire & Rubber Company | Pneumatic tire with asymmetric bead reinforcement |
EP2179871A2 (en) | 2006-11-22 | 2010-04-28 | The Goodyear Tire & Rubber Company | Pneumatic tire |
EP2179871A3 (en) * | 2006-11-22 | 2011-04-20 | The Goodyear Tire & Rubber Company | Pneumatic tire |
US8413700B2 (en) | 2010-02-04 | 2013-04-09 | Bridgestone Americas Tire Operations, Llc | Tire having staggered turn-ups |
US8517072B2 (en) | 2010-02-04 | 2013-08-27 | Bridgestone Americas Tire Operations, Llc | Tire having gum strip and chafer |
US9440499B2 (en) | 2010-02-04 | 2016-09-13 | Bridgestone Americas Tire Operations, Llc | Tire having gum strip and chafer |
CN111163948A (en) * | 2017-10-02 | 2020-05-15 | 米其林集团总公司 | Tire with reinforced lower region |
Also Published As
Publication number | Publication date |
---|---|
EP0810107A3 (en) | 1998-04-22 |
EP0810107B1 (en) | 2001-03-07 |
DE69704179T2 (en) | 2001-07-19 |
ES2154880T3 (en) | 2001-04-16 |
JP3679218B2 (en) | 2005-08-03 |
JPH1044725A (en) | 1998-02-17 |
US5958163A (en) | 1999-09-28 |
DE69704179D1 (en) | 2001-04-12 |
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